Well known and loved by competition fly anglers.
According to the manufacturers GTM is described as follows:
STROFT GTM is the most successful fishing line worldwide
due to its outstanding qualities. High tensile strength and
optimum elasticity and suppleness have made this line
an absolute favourite amongst anglers of all persuasions,
seeking a reliable line for premium applications.
The line is particularly appreciated amongst fly fishermen as
leader and tippet material.
The 50m version comes on a more compact spool which is nice if you carry a few diameters and you're wading. These smaller sized spools also fit Stroft cutting rings and the new Stroft Spools system.
The 50m spools can be fitted with Stroft Cutting Rings to make it easier to cut lengths of tippet.